I'm confused about how many shards should I put in a node(64G mem and 32 processers with 500G disk). Is there a range recommended？Some project also calculate the number of shards by capacity，in their testing, a 20G's shard is most suitable. So if their total index is 1.5T, their is almost 77 shards in the cluster . Is that a right way to calculate？
I also have a problem about how to add shards when horizontal expansion. As our cluster only have one type, is it a good idea to add shards by adding index and use a index alias to point to all indices?